关于控件的生命过程

先不多说,看一段代码:
Default.aspx

 1  <% @ Page Language = " C# "  AutoEventWireup = " true "  CodeFile = " Default.aspx.cs "  Inherits = " _Default "   %>
 2 
 3  <! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >
 4  < html  xmlns ="http://www.w3.org/1999/xhtml" >
 5  < head  runat ="server" >
 6       < title ></ title >
 7  </ head >
 8  < body >
 9       < form  id ="F"  runat ="server" >
       < div >
           < asp:GridView  ID ="GV"  runat ="server"  Width ="250px"  AutoGenerateColumns ="false" >
               < Columns >
                   < asp:TemplateField  HeaderText ="Name" >
                       < ItemTemplate >
                           < asp:TextBox  ID ="tbName"  runat ="server"  Text ='<%#Bind("Name")  % > '> </ asp:TextBox >
                       </ ItemTemplate >
                   </ asp:TemplateField >
                   < asp:TemplateField  HeaderText ="Age" >
                       < ItemTemplate >
                           < asp:TextBox  ID ="tbAge"  runat ="server"  Text ='<%#Bind("Age")  % > '>
                           </ asp:TextBox ></ ItemTemplate >
                   </ asp:TemplateField >
               </ Columns >
           </ asp:GridView >
           < br  />
           < asp:Button  ID ="Button1"  runat ="server"  Text ="Save"  Width ="143px"  
              onclick ="Button1_Click"   />
       </ div >
       </ form >
  </ body >
  </ html >
 

后台代码:Default.aspx.cs

 1  using  System;
 2  using  System.Collections.Generic;
 3  using  System.Linq;
 4  using  System.Web;
 5  using  System.Web.UI;
 6  using  System.Web.UI.WebControls;
 7 
 8  public   class  Person
 9  {
       public   string  Name {  get ;  set ; }
       public   int  Age {  get ;  set ; }
  }
 
  public   partial   class  _Default : System.Web.UI.Page
  {
       public  List < Person >  GetData()
      {
           return   new  List < Person >
                      {
                           new  Person{Name = " CsharpFarmer " ,Age = 26 },
                           new  Person{Name = " Rose " ,Age = 24 }
                      };
      }
 
       protected   void  Page_Load( object  sender, EventArgs e)
      {
          GV.DataSource  =   this .GetData();
          GV.DataBind();
      }
 
       protected   void  Button1_Click( object  sender, EventArgs e)
      {
          var data  =   this .GetData();
          data.Clear();
           foreach  (GridViewRow gvr  in  GV.Rows)
          {
              data.Add( new  Person { Name  =  ((TextBox)gvr.FindControl( " tbName " )).Text, Age  =   int .Parse(((TextBox)gvr.FindControl( " tbAge " )).Text) });
          }
          GV.DataSource  =  data;
          GV.DataBind();
      }
  }

取一段数据,然后绑定在GridView中,最后进行修改.
事实上无论我们怎么样点Save,我们会发现,数据始终没有变动,为什么呢?

要搞清这个问题,先看一下控件的生命周期.